From Browser Rendering to React Fiber: The Full React Performance Journey скачать в хорошем качестве

From Browser Rendering to React Fiber: The Full React Performance Journey

In this talk, I break down how React became fast and responsive by evolving from direct DOM updates → Virtual DOM → stack-based reconciliation → Fiber architecture → concurrent rendering, and how these internals unlock modern React features. We start with the Browser Critical Rendering Path (DOM, CSSOM, Render Tree, Layout/Reflow, Paint, Composite) to understand why UI updates are expensive. Then we move into React’s architecture: Virtual DOM diffing, O(n) reconciliation heuristics + keys, and why the execution model (blocking, synchronous stack reconciliation) was the real limitation—not the algorithm. The core of the session is a deep dive into React Fiber: What a Fiber node is (unit of work) Fiber’s “superpowers”: Pause, Abort, Schedule, Resume, Reuse Two-phase reconciliation: Render Phase (interruptible) vs Commit Phase (synchronous/atomic) #reactjs #javascript #reactcomponents #browser